CMMVC7147E The command cannot be initiated because one or more MDisks are provided by a storage system that does not support the system layer changing.
Explanation
The system layer cannot be changed if MDisks are currently
being provided by a Storwize® system.
User response
For each MDisk provided by a Storwize system, remove that MDisk from its storage pool. Once all such MDisks have been removed, change the Fibre Channel SAN zoning to remove connectivity between the nodes in the local system, and the nodes in the remote Storwize system. Finally, execute the detectmdisk command, and then change the system layer.